I overheard this conversation as I was walking out of my building on campus:
Guy, As he walks into the building: Hey what are you doing here? I must be stalking you.
Girl, Standing in front of the building: You must be.
Guy, all the way inside the building: You wouldn't be that lucky.
The girl didn't hear him say that because he was too far in the building, but I could still hear him. I don't think he wanted her to hear it anyways because he trailed off his sentence as if to say: "Why do I say the stupidest things to girls?"
Sometimes it works out better for both parties when the full conversation is missed.